Patio heater



FIG. 1 is an orthogonal view of the patio heater;

FIG. 2 is a left side elevation view there of;

FIG. 3 is a front elevation view there of;

FIG. 4 is a back elevation view there of;

FIG. 5 is a right side elevation view there of; and,

FIG. 6 is a top plan view there of. 

The ornamental design for a patio heater, as shown and described. 